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Finding the Fourth Proportional to 289.32, 399.27 and 178.86

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Solution

The fourth proportional to 289.32, 399.27 and 178.86 is: 246.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.32 : 399.27 = 178.86 : x
  2. Step 2: Convert to fraction form
    289.32/399.27 = 178.86/x
  3. Step 3: Cross multiply
    289.32x = 399.27 × 178.86
  4. Step 4: Simplify right side
    289.32x = 71,413.43
  5. Step 5: Solve for x
    x = 71,413.43/289.32
  6. Step 6: Final answer
    x = 246.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.